SOLUTION: A college student bought 11 books for fall classes. If the cost of his anatomy textbook was three times the mean cost of the other 10 books, then the cost of the anatomy textbook w

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Question 471566: A college student bought 11 books for fall classes. If the cost of his anatomy textbook was three times the mean cost of the other 10 books, then the cost of the anatomy textbook was what fraction of the total amount he paid for the 11 books?
a. 2/13
b. 3/13
c. 3/11
d. 3/10
e. 10/13
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Let C represent the total cost of the other 10 books: Mean cost of those = C/10

Anat = 3(C/10) = (3/10)C

T cost = (3/10)C + C = (3/10)c + (10/10)C = 13/10 C

the cost of the anatomy textbook was what fraction of the total amount 

he paid for the 11 books?

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